<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<html>
<body>
<h2>Hello World!</h2>
<form action="${pageContext.request.contextPath}/upload2" enctype="multipart/form-data" method="post">
    <input type="file" name="file"/>
    <input type="submit" value="upload">
</form>
<a href="${pageContext.request.contextPath}/download">点击下载</a>
</body>
</html>
